Answer:
a). If the genes are unlinked, 4 types of phenotypes would be arised according to Mendel experiments as follows..
Normal, short-eared (NNEE) x tufted, long-eared (nnee)----Parents
NnEe (normal, short-eared)----------------------------------------F1
F1 x F1
F2 Phenotypes:
Normal, short-eared (T_E_) = 9/16
Normal, long-eared (T_ee) = 3/16
Tufted, short-eared (ttE_) = 3/16
Tufted, long-eared (ttee) = 1/16
b). If the genes are completely linked, the following results will be come.
NE/NE x ne/ne----Parents
NE/ne-------------F1
NE ne
NE NE/NE (normal, short-eared) NE/ne (normal, short-eared)
ne NE/ne (normal, short-eared) ne/ne (tufted, short-eared)
Normal, short-eared (T_E_) = 3/4
Tufted, long-eared (ttee) = 1/4
c). The observed frequencies support the hypothesis that these are linked genes.
